We were playing with a sweet LED matrix accessory, scroll:bit by Pimoroni https://shop.pimoroni.com/products/scroll-bit
Now, we want to use this with the BrainPad but to do so we will need to know what chip is used on there. Looking at the code https://github.com/pimoroni/pxt-scrollbit there is not a single mention of what chip is being used! I guess I can just start with their code and modify it to work. But I am still curious about this chip!
So, peeking under a microscope at this tiny chip
It is TINY!!! Do you want to see it next to a pen? It is 4x4mm only!
How come this tiny chip withe few pins drive 144 LEDs?! Doing some searching I found out it is a part by ISSI http://www.issi.com/WW/pdf/IS31FL3731.pdf
This chip is impressive, so good job for ISSI for making it and Pimoroni for using it. The board layout is also nice.
Next time I will be coding this little 4x4mm chip!